<span>a collection of selected writings by different authors, usually in the same literary form, of the same time, or on the same subject.</span>
The quote means that Atticus is a great man who stands behind what he says and does, behaving the same in public as he does in his home. Unlike him, the others are two-faced, for example, publicly attacking Tom Robinson, while believing in the comfort of their homes that he might be innocent.
I chose the retelling of a plot tbh, idk if i got it wight or not